=============================================================================   
ROSETTA SPK Files                                                               
=============================================================================   
                                                                                
  This "aareadme.txt" file describes the contents of the KERNELS/SPK            
  directory of the ROSETTA SPICE data server. It also provides the file         
  naming conventions used for the ROSETTA SPK kernels, and it provides          
  identification of the most current version of each kind of SPK file.          
                                                                                
  Some of these SPK files are produced by an automated system located           
  at ESTEC, operated by the ROSETTA Science Ground Segment. For these we        
  have chosen to use the ESOC naming convention for SPK files, which are        
  converted from ESOC's DDID Orbit files.                                       
                                                                                
  The contents and time span covered by any SPK file may be easily determined   
  using the "brief" utility program available in all copies of the              
  SPICE Toolkit. Examples of usage:                                             
     %brief  <spk_file_name>                                                    
     %brief  <*.bsp>                                                            
     %brief  <xxx*.bsp>                                                         
                                                                                
  Descriptive information about how/why/when an SPK file was created is         
  usually available in the "comment area" of the file. This may be viewed       
  using the "commnt" utility program available in all copies of the             
  SPICE Toolkit. Use the "-r" option to read the comments. Example:             
    %commnt -r <spk_file_name>                                                  
                                                                                
  All binary SPK files (*.BSP) contained in this directory are unix binary      
  files. These may be used as is (without format conversion) in a non-unix      
  environment when using any recent version of the SPICE Toolkit (Version       
  N0052 or later).  [Ref 3b]                                                    
                                                                                
  Contact Marc Costa Sitja (mcosta@sciops.esa.int) or the ESA SPICE Service 
  (esa_spice@sciops.esa.int) if you have any questions.                           
                                                                                
                                                                                
=============================================================================   
References                                                                      
=============================================================================   

    1. Data Delivery Interface Document (DDID)       Appendix H - FD            
       products Issue 3.0 (ROSETTA-ESC-IF-5003)                                 
                                                                                
    2. SPK Required Reading. NAIF Document No. 168.10  05 Sep 2002              
                                                                                
    3. Selected SPICE Tutorials from the NAIF server:                           
ftp://naif.jpl.nasa.gov/pub/naif/toolkit_docs/Tutorials/office/individual_docs  
                                                                                
       a) SPK Tutorial                14_spk.ppt                                
       b) Porting Kernels Tutorial    09_porting_kernels.ppt                    
                                                                                                                                                             
                                                                                
=============================================================================   
ROSETTA SPK Directory Structure                                                 
=============================================================================   

 aareadme.txt         Text file describing the directory structure, the naming  
                      conventions for the SPKs, and the current version(s) of   
                      each SPK type.                                            
                                                                                
 former_versions      Subdirectory that contains obsolete versions of the       
                      SPK files that have been updated in the Current SPK       
                      Kernels Set.                                              
                                                                                
                                                                                                                                                            
=============================================================================   
ROSETTA Spacecraft SPK Naming Covention for the cruise phase:                   
                                                                                
                ffff_______________vvvvv.BSP                                    
                                                                                
=============================================================================   
                                                                                                                                                             
      token          description                                                
      ------------   --------------------------------------------               
      ffff           Source Product Type Identifier:                            
                        ORHR -- S/C orbit, Cruise, heliocentric                 
                        ORER -- S/C orbit, 1st Earth swingby                    
                        ORMR -- S/C orbit, Mars Swingby, Mars Centric           
                        ORFR -- S/C orbit, 2nd Earth swingby, Earth Centric     
                        ORGR -- S/C orbit, 3rd Earth swingby, Earth Centric     
                        ORPR -- S/C orbit, medium term planning, comet centric  
                        ORWR -- S/C orbit, comet centric                        
                        ORHW -- comet orbit, heliocentric                       
                        ORHO -- 1st asteroid orbit, heliocentric                
                        ORHS -- 2nd asteroid orbit, heliocentric                
                                                                                
                                                                                
      vvvvv          version number                                                                                                                          
                                                                                
                                                                                
=============================================================================   
ROSETTA Spacecraft SPK Naming Covention for the comet phase:                    
                                                                                
                ffff_Dc_nnn_vv_ww_a[_Txx]_vvvvv.BSP                                   
                                                                                
=============================================================================   
                                                                                
         token          description                                             
       ---------  --------------------------------------------               
         ffff      LORB -- Rosetta lander (Philae) trajectory, VSTP.       
                   LORL -- Rosetta lander (Philae) trajectory, LTP.        
                   CORB -- comet orbit, VSTP.                              
                   CORL -- comet orbit, LTP.                               
                   RORB -- S/C orbit, VSTP.                                
                   RORL -- S/C orbit, LTP.                                 
                                                                           
                                                                           
         c         is L for long term products or M for medium term        
                   products, S for short term and V for very short term    
                   (note that there are currently no FD products associated
                   with the short term cycle).                             
                                                                           
         nnn       is the planning cycle counter on 3 digits, starting from
                   001, strictly monotonically increasing per planning cycle
                   type e.g.:                                              
                                                                           
                         - for LTP products 001 for pre-landing operations,
                           002 for first cycle including lander delivery and
                           first extended monitoring phase part and so on. 
                                                                           
                         - for MTP products, the counter as agreed between FD
                           and FCT an documented in FCT timelines (see [FOP]),
                           VSPL file and PTSL.                             
                                                                           
         vv        is the version within the planning cycle (e.g. in case  
                   products have to be re-generated, due to errors). Note that
                   a full set of consistent products shall be delivered for a
                   cycle containing the same vv version. In case redelivery is
                   required, a full set of consistent products shall be 
                   delivered, with a new incremented vv version. In the same 
                   way, FD expects that deliveries of all input products from 
                   the SGS corresponding to a given cycle have the same vv
                  version.
                                                                           
         ww is:                                                            
                                                                           
                         - for VSTP products __.                           
                                                                           
                         - for MTP products generated by FD the version of the
                           corresponding SGS MTP input products.           
                                                                           
                         - for LTP products generated by FD for pre-landing
                           operations __ (no SGS inputs are required by FD for
                           LTP for pre-landing operations).                
                                                                           
                         - for LTP products generated by FD for the extended
                           monitoring phase the version of the corresponding SGS
                           LTP input products.                             
                                                                           
         a         is a character indicating the trajectory type that can take 
                   the following values:                                       
                                                                           
                         - For VSTP products _.                            
                                                                           
                         - For MTP/LTP products in the pre-landing phase 'A', 
                           'B' or 'C'... corresponding to nominal trajectory, 
                           first backup trajectory, second backup trajectory...         
                                                                           
                         - For MTP/LTP products in the extended monitoring 
                           phase 'H' for products that correspond to high 
                           activity case trajectories or 'P' for products that 
                           corresponds to preferred trajectory.
                                                                           
         xx        is the SPK kernel type specification. If present will be 19 
                   in order to fix the segment overload for Type 18 kernels 
                   (optional).       
                                                                  
         vvvvv     version number                                          
                              

=============================================================================   
ROSETTA Spacecraft SPK Naming Covention for reconstructed trajectory: 
                                                                                  
                ROS_originator_type_YYMM_yymm_Vv.BSP
                                                                                 
=============================================================================

      token           description                                               
      ---------       -------------------------------------------------------   
      originator      Institution that originated the kernel
      type            Reference to the technique used to process the data                       
      YYMM            Year and month of coverage start
      yymm            Year and month of coverage end      
      v               version number      


=============================================================================   
ROSETTA Spacecraft SPK Naming Covention for extended coverage after end of 
mission:                    
                                                                                  
                body_EXTENDED_Vvv.BSP 
                                                                                 
=============================================================================  

      token           description                                               
      ---------       -------------------------------------------------------   
      body            Body:                                    
                        ROS_ORBITER: Rosetta Orbiter (-226)                         
                        ROS_LANDER: Rosetta Lander (-226800)                             
      vv              version number      


=============================================================================   
ROSETTA Lander Mission SPK Naming Covention: 

                 LORB_origin_frame_[rebound]_phase_vv.BSP

=============================================================================  

      token           description                                               
      ---------       -------------------------------------------------------                             
      
      origin          Lander orbit origin.
      frame           Frame in which the lander orbit is expressed.
      [rebound]       Rebound number for the RBD phase, from 1 to 6.
      phase           Lander Mission Phase:
                       SDL -- Separation, Descent and First Landing                                  
                       RBD -- Rebounds
                       FSS -- First Science Sequence    
      vv              version number.                     


=============================================================================   
ROSETTA Lander Landing Site SPK Naming Covention: 

                 SPICE_PHILAE_originator_vv.BSP

============================================================================= 

      originator      Data provider: SONC-FD (SONC), CONSERT (CN) or 
                      OSIRIS (SR)
      vv              version number.


=============================================================================   
DSN Stations SPK  Naming Convention     EARTHSTNS_[spec]_yymmdd.BSP             
=============================================================================   
                                                                                
      token           description                                               
      ---------       -------------------------------------------------------   
      [spec]          Reference frame label:                                    
                        FX:     EARTH_FIXED alias used.                         
                        ITRF93: ITRF93 label used.                              
      yymmdd          Release date.                                             
                                                                                
                                                                                
=============================================================================   
Planet and Satellite Ephemeris SPK Naming Convetion                             
=============================================================================   

 Use original names assigned by NAIF, in uppercase. For example:                
                                                                                
          DE405.BSP      Planetary ephemeris                                    
                                                                                
                                                                                                                                                    
=============================================================================   
Current SPK Kernels Set                                                         
=============================================================================   
                                                                                
Note: Files EARTHSTNS_FX_yymmdd.BSP and EARTHSTNS_ITRF93_yymmdd.BSP contain     
the same data. These files only differ in that the second one use the           
reference frame label 'ITR93' instead of 'EARTH_FIXED'. 'EARTH_FIXED' alias     
must be map to either 'ITR93' or 'IAU_EARTH' before using the file. For high    
accuracy work, the EARTHSTNS_ITRF93_yymmdd.BSP is recommended (on the basis     
of ease of use).                                                                
                                                                                
                                                                                
 Name                               Comments                                    
 ---------------------------------  -----------------------------------------   
                                                                                
 C2001Q4.BSP                        Contains ephemeris data for the comet       
                                    C2001/Q4 - NEAT. Spans from January 2004    
                                    to October 2004.                            
                                                                                
 C2002_T7_LINEAR_HOR_V01.BSP        Contains ephemeris data for the comet       
                                    C2002/T7 - LINEAR. Spans from March 2004  
                                    to December 2016.

 C2004_Q2_MACHHOLZ_HOR_V01.BSP      Contains ephemeris data for the comet       
                                    C2004/Q2 - MACHHOLZ. Spans from 20 January
                                    2005 to 21 January 2005.

 C2010_A2_LINEAR_HOR_V01.BSP        Contains ephemeris data for the comet       
                                    C2010/A2 - LINEAR. Spans from March 2004  
                                    to December 2016.

 MAR097_030101_170101_V0001.BSP     Contains ephemeris data for the Martian
                                    System. Spans from January 2003 to December
                                    2016.

 VESTA_HOR_V01.BSP                  Contains ephemeris data for Vesta. Spans
                                    from March 2004 to December 2016.

 DE405.BSP                          Contains ephemeris data for planet          
                                    barycenters, and for the Sun, planets       
                                    and satellites mass centers. It covers      
                                    until 2050.                                 
                                                                                
 EARTHSTNS_FX_yymmdd.BSP            Contains ephemeris data for NASA            
                                    DSN stations relative to the terrestrial    
                                    reference frame ITR93. In the interest of   
                                    flexibility, in this file the reference     
                                    frame is labeled with the alias             
                                    'EARTH_FIXED'. Any application using this   
                                    file must map the alias 'EARTH_FIXED' to    
                                    either 'ITR93' or 'IAU_EARTH'. This file    
                                    was released on yy-mm-dd.                   
                                                                                
 EARTHSTNS_ITRF93_yymmdd.BSP        Contains ephemeris data for NASA            
                                    DSN stations relative to the terrestrial    
                                    reference frame label 'ITR93'. This file    
                                    was released on yy-mm-dd.                   
                                                                                
 ESTRACK_Vvv.BSP                    This kernel defines the position for each    
                                    of the ESA ESTRACK ground stations, as      
                                    seen from the center of the Earth, in the   
                                    topocentric frame defined in the
                                    corresponing ESTRACK FK.
                                                                                
 NEW_NORCIA.BSP                     Contains ephemeris data for the             
                                    ESA New Nortia station.                     
                                                                                
 ORER_______________vvvvv.BSP       Contains Rosetta spacecraft reconstructed   
                                    ephemeris of 1st Earth flyby. Spans the     
                                    1st Earth flyby period. These ephemeris     
                                    corresponds to the ESOC orbit file named:   
                                    ORER_FDLRMA_DA______________vvvvv.ROS       
                                    where vvvvv designates the version number.  
                                                                                
 ORFR_______________vvvvv.BSP       Contains Rosetta spacecraft predicted       
                                    ephemeris of 2nd Earth flyby. Spans the     
                                    2nd Earth flyby period. These ephemeris     
                                    corresponds to the ESOC orbit file named:   
                                    ORFR_FDLRMA_DA______________vvvvv.ROS       
                                    where vvvvv designates the version number.  
                                                                                
 ORGR_______________vvvvv.BSP       Contains Rosetta spacecraft predicted       
                                    ephemeris of 3rd Earth flyby. Spans the     
                                    3rd Earth flyby period. These ephemeris     
                                    corresponds to the ESOC orbit file named:   
                                    ORGR_FDLRMA_DA______________vvvvv.ROS       
                                    where vvvvv designates the version number.  
                                                                                
 ORHO_______________vvvvv.BSP       Contains ephemeris for the asteroid Steins, 
                                    that corresponds to the ESOC orbit file 
                                    named ORHO_FDXRMY_DA______________vvvv.ROS, 
                                    where X can be R or L, Y can be A or B, and 
                                    vvvv is the version number.                         
                                                                                
 ORHR_______________vvvvv.BSP       Contains Rosetta spacecraft predicted and   
                                    reconstructed cruise ephemeris. Spans the   
                                    cruise phase, from launch to comet          
                                    rendezvous maneouver. These ephemeris       
                                    corresponds to the ESOC orbit file named:   
                                    ORHR_FDLRMA_DA______________vvvvv.ROS       
                                    where vvvvv designates the version number.  

 ORHR___________T19_vvvvv.BSP       Contains Rosetta spacecraft predicted and   
                                    reconstructed cruise ephemeris. Spans the   
                                    cruise phase, from launch to comet          
                                    rendezvous maneouver. These ephemeris       
                                    corresponds to the ESOC orbit file named:   
                                    ORHR_FDLRMA_DA______________vvvvv.ROS       
                                    where vvvvv designates the version number.
                                    This product is a Type 19 SPK kernel and 
                                    requires at least the SPICE Toolkit N0065 
                                    to be used.         
                                                                                
 ORHS_______________vvvvv.BSP       Contains ephemeris for the asteroid Lutetia,
                                    that corresponds to the ESOC orbit file 
                                    named ORHS_FDXRMY_DA______________vvvvv.ROS, 
                                    where X can be R or L, Y can be A or B, and 
                                    vvvv is the version number.                         
                                                                                
 ORMR_______________vvvvv.BSP       Contains Rosetta spacecraft reconstructed   
                                    ephemeris of Mars flyby. Spans the          
                                    Mars flyby period. These ephemeris          
                                    corresponds to the ESOC orbit file named:   
                                    ORMR_FDLRMA_DA______________vvvvv.ROS       
                                    where vvvvv designates the version number.                                                             
                                                                               
 ORHW_______________vvvvv.BSP       Contains ephemeris data for the Comet       
                                    Churyumov-Gerasimenko/67P. These ephemeris 
                                    are the same contained in the corresponding 
                                    ESOC orbit file named 
                                    ORHW_FDLRMA_DA______________vvvvv.ROS,
                                    where vvvvv designates the version number.  

 RORB_DV_nnn_vv_______vvvvv.BSP     This product defines the Rosetta S/C orbit. 
                                    It is produced as result of the navigation 
                                    process and trajectory optimisation for each
                                    VSTP cycle. This file covers a period in the
                                    future 'as optimised', for the up-coming 
                                    operations. 

 RORB_DV_nnn_vv___T19_vvvvv.BSP     This product defines the Rosetta S/C orbit. 
                                    It is produced as result of the navigation 
                                    process and trajectory optimisation for each
                                    VSTP cycle. This file covers a period in the
                                    future 'as optimised', for the up-coming 
                                    operations. This product is a Type 19 SPK 
                                    kernel and requires at least the SPICE 
                                    Toolkit N0065 to be used.             

 CORB_DV_nnn_vv_______vvvvv.BSP     This product defines the comet 
                                    Churyumov-Gerasimenko orbit as result of the
                                    navigation process for each VSTP cycle and 
                                    propagated into the future.  

 CORB_DV_nnn_vv___T19_vvvvv.BSP     This product defines the comet 
                                    Churyumov-Gerasimenko orbit as result of the
                                    navigation process for each VSTP cycle and 
                                    propagated into the future. This product is 
                                    a Type 19 SPK kernel and requires at 
                                    least the SPICE Toolkit N0065 to be used.

 LORB_DV_nnn_vv_______vvvvv.BSP     This product defines the predicted descend
                                    trajectory of the Rosetta lander as result
                                    of the lander delivery planning activities. 
                                    This product is exchanged with the lander
                                    team during the lasts VSTP cycles prior to 
                                    lander delivery.      

 LORB_DV_nnn_vv___T19_vvvvv.BSP     This product defines the predicted descend
                                    trajectory of the Rosetta lander as result
                                    of the lander delivery planning activities.
                                    This product is exchanged with the lander
                                    team during the lasts VSTP cycles prior to
                                    lander delivery. This product is a Type 19
                                    SPK kernel and requires at least the SPICE 
                                    Toolkit N0065 to be used.       

 LORB_SUN_J2000_SDL_Vvvv.BSP        This product reconstructs the descend 
                                    trajectory of the Rosetta lander as 
                                    provided by SONC-FD. 

 LORB_SUN_J2000_RBD_n_Vvvv.BSP      This product reconstructs the rebound 
                                    trajectory of the Rosetta lander as 
                                    provided by SONC-FD. There are six 
                                    candidate trajectories available.

 LORB_C_G_FIXED_RBD_7_V2_0.BSP      This reconstruction of the lander rebound
                                    trajectory is considered by the 7Dwarfs
                                    team - which was commissioned by the
                                    Rosetta Science Working Team - as the to
                                    date most reliable reconstruction. It
                                    superseeds the six SONC-FD candidate
                                    trajectories.

 LORB_ROS_SC_PRESEP_Vv_v.BSP        Rosetta Lander Trajectory before the Lander
                                    separation from the Rosetta Orbiter. 
                                    The Rosetta Lander is attached to 
                                    the Rosetta Orbiter.
                                    
 RORL_DL_nnn_vv_ww_a_vvvvv.BSP      This product contains the long term orbit 
                                    predictions for the Rosetta orbit.                 

 RORL_DL_nnn_vv_ww_a_T19_vvvvv.BSP  This product contains the long term orbit 
                                    predictions for the Rosetta orbit. This 
                                    product is a Type 19 SPK kernel and requires 
                                    at least the SPICE Toolkit N0065 to be used.                            
                                                                                
 LORL_DL_nnn_vv_ww_a_vvvvv.BSP      This product contains the prediction of the 
                                    lander descend trajectory generated at long 
                                    term, which will be generated once the 
                                    landing area has been selected.

 LORL_DL_nnn_vv_ww_a_T19_vvvvv.BSP  This product contains the prediction of the 
                                    lander descend trajectory generated at long 
                                    term, which will be generated once the 
                                    landing area has been selected. This product 
                                    is a Type 19 SPK kernel and requires at 
                                    least the SPICE Toolkit N0065 to be used.       
                                                                                
 CORL_DL_nnn_vv_ww_a_vvvvv.BSP      This product contains the long term orbit 
                                    predictions for the comet orbit.    

 CORL_DL_nnn_vv_ww_a_T19_vvvvv.BSP  This product contains the long term orbit 
                                    predictions for the comet orbit. This 
                                    product is a Type 19 SPK kernel and requires
                                    at least the SPICE Toolkit N0065 to be used.

 OUTERPLANETS_Vvvvv.BSP             Ephemeris information (predicted) for the
                                    outer planets of the solar system: Jupiter,
                                    Saturn, Uranus and Neptune. It is meant to 
                                    complement DE405.BSP, which contains 
                                    information for their barycenters, but not
                                    the bodies themselves. 
                                                                                
 ROS_STRUCT_Vv.BSP                  This file contains the location of various  
                                    Rosetta instruments and structures.

 ROS_COG_Vv.BSP                     This file contains the location of the
                                    Rosetta Center of Gravity (CoG).

 ROS_ORBITER_EXTENSION_Vv.BSP       This product contains an extension of the
                                    Rosetta S/C orbit after end of mission in
                                    order to have coverage until 2017-01-01.
                                    The Rosetta S/C state vector is constant
                                    with respect to the Churyumov-Gerasimenko
                                    C-Kernel based frame and is defined by 
                                    the last state vector provided by the 
                                    RORB_DV_257_02_______00344.BSP kernel. 
                                    The file is generated using the NAIF 
                                    utility PINPOINT.

 ROS_DLR_S4S_1408_1409_Vv.BSP       This product contains 251 Type 9/Degree 1 
                                    SPK segments each covering a two-second 
                                    interval corresponding to one of OSIRIS 
                                    images taken in August-September 2014 and 
                                    used in producing the SHAP4S shape model. 
                                    The position during each interval is 
                                    constant.

 SPICE_PHILAE_CFF_CN_Vv_v.BSP       This product contains an extension of the
                                    Rosetta Lander orbit after end of mission 
                                    in order to have coverage until 
                                    2017-01-01 with a candidate of the final 
                                    lander location as predicted by the
                                    CONSERT team. The file is generated 
                                    using the NAIF utility PINPOINT.


 SPICE_PHILAE_CFF_SONC_Vv_v.BSP     This product contains an extension of the
                                    Rosetta Lander orbit after end of mission 
                                    in order to have coverage until 
                                    2017-01-01 with a candidate of the final 
                                    lander location as predicted by the
                                    SONC FDy team. The file is generated 
                                    using the NAIF utility PINPOINT.

 SPICE_PHILAE_CFF_SR_Vv_v.BSP       This product contains an extension of the
                                    Rosetta Lander orbit after end of mission 
                                    in order to have coverage until 
                                    2017-01-01 with a candidate of the final 
                                    lander location as predicted by the
                                    OSIRIS team. The file is generated 
                                    using the NAIF utility PINPOINT.
                                                                                
 TEMPEL1_9P_DI_P.BSP                Contains predicted ephemeris for the comet  
                                    Tempel-1/9P courtesy of Deep Impact Team.   
                                    These ephemeris were compute just before    
                                    the impact. Spans from May 2005 to          
                                    September 2005.

 21_LUTETIA_2004_2016.BSP           Contains ephemeris for the asteroid
                                    Lutetia. This file was generated and
                                    provided by NAIF early in the mission.

 2867_STEINS_2004_2016.BSP          Contains ephemeris for the asteroid 2867
                                    Steins. This file was generated and
                                    provided by NAIF early in the mission.

 67P_CHURY_GERAS_2004_2016.BSP      Contains ephemeris for the comet 67P/C-G.
                                    This file was generated and provided by
                                    NAIF early in the mission. This file is
                                    superseded by all other 67P/C-G SPKs.




Note to be added: Note that these were integrated with DE-0431 while ROS
kernels set uses DE405. Using mismatched DE405 with these SPKs introduces
an error of under 1 km (see SPKDIFF runs below), which is orders of magnitude
below the resolution of observations and is probably insignificant

-------------------                                                             
                                                                                
        This file was last modified on Jan. 31, 2018 (M. Costa)


End of aareadme file.
